body{
    display: -webkit-flex;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.main{
    flex-grow: 1;
    display: -webkit-flex;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 50px 0;
}

.main h1{
    text-align: center;
    color: #333;
}

.main h3{
    font-size: 16px;
    text-align: center;
    color: #bbb;
    font-weight: normal;
}

.main h3 a{
    color: #666;
    margin-left: 5px;
}

.main h3 a:hover{
    text-decoration: underline;
}

.search-area{
    width: 68%;
    margin: 40px auto 30px;
}

.btn-area{
    text-align: right;
    margin-top: 20px;
}

.btn-area .btn{
    font-size: 15px;
}

.search-btn{
    color: #fff;
    background-color: #51d696;
    -webkit-transition: background-color .4s ease-in-out 0s;
    -moz-transition: background-color .4s ease-in-out 0s;
    -ms-transition: background-color .4s ease-in-out 0s;
    -o-transition: background-color .4s ease-in-out 0s;
    transition: background-color .4s ease-in-out 0s;
}

.search-btn:hover{
    background-color: #1db671;
    color: #fff;
}

.search-btn:focus{
    outline: none;
    color: #fff;
}

.checkbox{
    display: inline-block;
    margin-right: 5px;
    color: #555;
}